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Analysis of emissions collected from four types of iron casting molds.

Palmer WG; James RH; Moorman WJ
Am Ind Hyg Assoc J 1985 Dec; 46(12):724-730
Emissions from four types of iron (7439896) casting molds were studied. Emission samples from iron casting molds with four types of chemical binders, furan (110009), urethane (51796), green sand with sea coal, and phenol (108952) formaldehyde (50000) resins, were collected form pouring lines at which grey iron was cast. Sampling locations, which would minimize contamination from other processes, were selected. Emissions were collected from highly concentrated sources using a high volume sampler. The samples were collected on filters and washed with water to remove water soluble compounds for analysis. The samplers were then washed with cyclohexane for 16 hours to extract associated organic materials. Samples were dried at 60 degrees-C, desiccated, and weighed. Concentrations of eight compounds, acridine (260946), naphthalene (91203), carbazole (86748), phenanthrene (85018), benzo(a)anthracene (56553), chrysene (218019), benzo(a)pyrene (50328), and dibenzo(a,h)anthracene (53703) were determined. Analysis was carried out by gas chromatography/mass spectrometry. The amount of particulate fraction soluble in cyclohexane varied from 16 to 36 percent between mold types; the content for urethane and furan molds was lower than those from shell and green sand molds. Concentrations of acridine from emissions in urethane molds were the highest, 25 micrograms per gram (microg/g), 13microg/g in furan molds, and 37.7microg/g in green sand. Shell type castings did not generate any acridine in emission samples. Traces of naphthalene were found in samples from urethane molds only. Carbazole and dibenz(a,h)anthracene were absent in all samples. Contents of benzo(a)pyrene in shell and green sand mold emission samples were 130 and 58microg/g, respectively. Concentrations of phenanthrene in shell and green sand were the highest, 720 and 1,800microg/g, respectively, whereas the other two emission samples did not contain any of these chemicals. Benzo(a)anthracene and chrysene were present in significant amounts in shell and green sand emission samples only. The authors conclude that emissions from furan and urethane molds contain small amounts of particulates and should therefore be used to cast iron.
NIOSH-Author; Emission-sources; Sampling-equipment; Analytical-methods; Chromatographic-analysis; Monitoring-systems; Industrial-emissions; Health-hazards; Gas-chromatography; Spectrographic-analysis; Chemical-composition
7439-89-6; 110-00-9; 51-79-6; 108-95-2; 50-00-0; 260-94-6; 91-20-3; 86-74-8; 85-01-8; 56-55-3; 218-01-9; 50-32-8; 53-70-3
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American Industrial Hygiene Association Journal
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division